<!DOCTYPE html>
<html lang="en">
<head>
<title></title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<script>
/*
* TODO:
* - [x] rewrite functions to not use copied functions
* - [x] add UI
* - [x] add style
* - [x] make everything not look like made at 0:41 on a phone
*/
function infohashToBase64(infohash) {
// Converts an hex infohash into base64.
// Convert hex into an byte array
let byteArray = infohash.replace(/[^0-9a-fA-F]/g, '')
.match(/[0-9a-fA-F]{2}/g);
for(var i = 0; i<byteArray.length; i++) {
byteArray[i] = parseInt(byteArray[i], 16);
}
// Convert byteArray into base64
return btoa(
String.fromCharCode.apply(
null, new Uint8Array(byteArray)
)
);
}
function base64ToInfohash(b64) {
// Converts a base64 value into a infohash (in a hex form)
// Convert base64 into an byteArray
let binaryString = atob(b64);
let byteArray = new Uint8Array(binaryString.length);
for (var i = 0; i < binaryString.length; i++) {
byteArray[i] = binaryString.charCodeAt(i);
}
// Convert byteArray into hex values
return Array.from(byteArray, function(byte) {
return ('0' + (byte & 0xFF).toString(16)).slice(-2);
}).join('');
}
// Everything for the UI itself
// Holds the state of tabs.
// Intended values are "encode" and "decode"
let tabOpen = "encode"
function switchTab(name) {
// Switches the tab
// only "encode","decode" and "about" values are supported
let url = new URL(window.location)
url.searchParams.set("tab", name)
window.history.replaceState(null, "", url.href)
if (name === "encode") {
document.getElementById("encode").style.display = "block"
document.getElementById("decode").style.display = "none"
document.getElementById("about").style.display = "none"
} else if (name === "decode") {
document.getElementById("encode").style.display = "none"
document.getElementById("decode").style.display = "block"
document.getElementById("about").style.display = "none"
} else if (name === "about") {
document.getElementById("encode").style.display = "none"
document.getElementById("decode").style.display = "none"
document.getElementById("about").style.display = "block"
}
}
addEventListener("DOMContentLoaded", (event) => {
// Get the current query params
const urlParams = new URLSearchParams(window.location.search);
if (
urlParams.has("tab") &&
["encode", "decode", "about"].includes(urlParams.get("tab"))
) {
// Check if tab parameter is set up and is correct
// If not, an default value will be used
tabOpen = urlParams.get("tab")
}
switchTab(tabOpen)
document.getElementsByClassName("tabBar")[0].style.display = "flex"
// Show the result of the action performed before reloading
if (urlParams.get("tab") === "encode" && urlParams.has("infohashv1")) {
document.getElementById("encodeResult").innerText = infohashToBase64(urlParams.get("infohashv1"))
} else if (urlParams.get("tab") === "decode" && urlParams.has("base64value")) {
document.getElementById("decodeResult").innerText = base64ToInfohash(urlParams.get("base64value"))
}
});
</script>
<style>
body {
width: 100vw; height: 100vh;
margin: 0; padding: 0;
display: flex; flex-direction: column;
justify-content: center;
align-items: center;
background-color: #10101a;
color: white;
font-family: monospace;
}
main {
background-color: #202025;
padding: 1em;
border: 1px solid white;
border-radius: 1em;
box-shadow: 0px 5px 15px black, 0px 1px 15px black inset;
}
input {
color: white;
background-color: transparent;
border: 1px solid white;
}
label {
margin-right: 0.5rem;
}
.tab {
border: 1px solid white;
padding: 1em;
border-radius: 0em 1em 1em 1em;
box-shadow: 0px 5px 15px black, 0px 1px 15px black inset;
}
.result:empty { display: none;}
.result {
background-color: rgba(32, 32, 42, 0.5);
margin-top: 1em;
padding: 0.5rem;
border: 1px solid gray;
border-radius: 1em;
}
.tab, .tabBar {
display: none; /* Default value to keep tabs hidden when JS is not available */
}
.button {
padding: 0.5em;
border: 1px solid white;
border-bottom: none;
transition: box-shadow 200ms ease;
}
.leftButton {
border-radius: 1em 0em 0em 0em;
}
.button:hover {
box-shadow: 0px 5px 25px black;
}
.button:active {
background-color: rgba(255,255,255, 0.2);
}
a { color: cyan; text-decoration: none;}
#about {
max-width: 40rem;
}
</style>
</head>
<body>
<main>
<h1>infohash ↔ base64</h1>
<noscript>
This tool requires JavaScript to function.
You can use DevTools in your browser to look at the code (it's intended to be easily readable).
</noscript>
<div class="tabBar">
<div onclick="switchTab('encode')" class="button leftButton">Encode</div>
<div onclick="switchTab('decode')" class="button">Decode</div>
<div onclick="switchTab('about')" class="button right">About</div>
</div>
<div class="tab" id="encode">
<form>
<h2>Encode</h2>
<input type="hidden" name="tab" value="encode" />
<label for="infohashv1">infohash v1</label><input type="text" id="infohashv1" name="infohashv1" pattern="[0-9a-f]*" />
<input type="submit" method="get" value="convert"/>
</form>
<div class="result" id="encodeResult"></div>
</div>
<div class="tab" id="decode">
<form>
<h2>Decode</h2>
<input type="hidden" name="tab" value="decode" />
<label for="base64value">base64 value</label><input type="text" id="base64value" name="base64value" />
<input type="submit" method="get" value="convert"/>
</form>
<div class="result" id="decodeResult"></div>
</div>
<div class="tab" id="about">
<h2>About</h2>
<p>
This tool was made to work with <a href="https://lemmy.dbzer0.com/post/1009713">an suggestion posted by @toxictenement@lemmy.dbzer0.com</a>
by <a href="https://magmaus3.eu.org">magmaus3</a>.
</p>
<p>
You can check the source code by downloading the page (everything is stored in a single html file),
by going to your browser's devtools or on <a href="https://codeberg.org/magmaus3/infohash2base64">Codeberg</a>.
</p>
</div>
</main>
</body>
</html>